NaHSO<sub>4</sub>/SiO<sub>2</sub> catalyzed generation of <i>o</i>-quinone/ <i>o</i>-thioquinone methides: synthesis of arylxanthenes/ arylthioxanthenes <i>via</i> oxa-6π-electrocyclization
作者:Muthupandi Karthick、Edwin Konikkara Abi、Nagamalla Someshwar、Savarimuthu Philip Anthony、Chinnasamy Ramaraj Ramanathan
DOI:10.1039/d0ob01868f
日期:——
molecules of natural and biological significance. Among several synthetic protocols, the acid catalyzed generation of ortho-quinone methides from suitably substituted phenols is a promising method for further exploitation in organic synthesis. Such an interesting reactive species is conveniently employed in the synthesis of conformationally restricted triarylmethane derivatives such as 12/9-arylxanth